{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-88952",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-88952",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-17T14:15:19.506Z",
    "updatedAt": "2026-09-17T19:32:55.621Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "OAuth2 sign-in attached to an existing account without an email comparison in AshAuthentication",
      "summary": "Improper Authentication vulnerability in team-alembic AshAuthentication allows an attacker to be signed in as another user by linking an OAuth2 identity to an account that is not theirs.\n\nAshAuthentication.Strategy.OAuth2.UserResolver.resolve/3 matches an existing account using the register action's upsert_identity keys, then gates linking the incoming provider identity to it on email_trusted?/2, which reads only the provider's email_verified boolean and never compares the provider's email value with the matched account's email. That gate assumes the account was matched by its email field, so under any other upsert_identity it is vacuous and an attacker presenting their own verified email is attached to, and issued a session for, an account matched on some other attribute. The same unguarded gate applies in OAuth2.SignInPreparation on the registration_enabled? false path, where the account is matched by the sign-in action's read filter instead. The upsert also rewrites the matched account's email to the attacker's address, so later account recovery reaches the attacker rather than the owner.\n\nThis issue affects ash_authentication: from 4.14.0 before 4.15.0 and from 5.0.0-rc.10 before 5.0.0-rc.14.",
      "affected": [
        {
          "vendor": "team-alembic",
          "product": "ash_authentication",
          "packageName": "ash_authentication",
          "collectionURL": "https://repo.hex.pm",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4.14.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15.0"
            },
            {
              "version": "5.0.0-rc.10",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.0.0-rc.14"
            }
          ]
        },
        {
          "vendor": "team-alembic",
          "product": "ash_authentication",
          "packageName": "team-alembic/ash_authentication",
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "64530644f9b37ebb76ca14aeb83a77597a0034b7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "*",
              "changes": [
                {
                  "at": "738bf9f32f2aa0d1bb92ce9ca5c2476cb5710459",
                  "status": "unaffected"
                },
                {
                  "at": "2bd630eef8b7c8ae1e90e8fd43ba12fbc7e256ba",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "42edcd8ebb13fafbb168f12591d7518ce0611fec",
              "status": "affected",
              "versionType": "git",
              "lessThan": "*",
              "changes": [
                {
                  "at": "738bf9f32f2aa0d1bb92ce9ca5c2476cb5710459",
                  "status": "unaffected"
                },
                {
                  "at": "2bd630eef8b7c8ae1e90e8fd43ba12fbc7e256ba",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}